This one is perfect for taking in the breathtaking scenery and calm of the northern Thailand Mountains would be great on any upright bike but easiest on a light bike... if you are continuing around the loop anything with pegs will save you from a sore behind, the locals still prefer the light but robust semi auto 125
Honda Wave all through this terrain

Koh Samui is a beautiful tropical island in Southern Thailand. But rather than spend our time going round the island on our last trip we hired bikes and took a ride to the rainforest of Khao Sok National Park. We actually continued to Phuket and back. But the ride from Khao Samui up to the rainforest is really beautiful. Especially the last 30 miles as you get close to the Khao Sok National Park Area. You can see videos of our trip at
http://www.youtube.com/playlist?list=PLD28U3l47mf2aZhoxOAZnRZ-mU9PoNDmt
Or via our website at http://on-the-wind.com

Some 1800+ corners in around 400 ish miles - lots of elevation chagnes - means that there is lots of hairpins and windy sections!

Excellent scenery, open & generally empty roads

A couple of times, with no warning, the road surface dissapears to gravel which is a bit of a shock - as it does happen on a blind downhill corner and blind hill!

Watch out of random dogs running in front of you and the locals driving style! Pullingout without looking and attempting to overtake on the outside of blind corners! They also expect bikers to move across to the hardshoulder/verge when they are overtaking and your coming in the opposite direction....

A real curve-fest! Pai is about 3 hours from Chiang Mai. Just about right for a day trip. I read somewhere that there are 800 curves between Chiang Mai and Pai. The road surface isn't the best but, it's not terrible either. I really enjoyed it. Pai is a backpacker stop with lots of restaurants.

Nort Thailand is biker's heaven.
I have been driving in north Thailand twice, -07 and again this winter, total round 2500km.
Norht Thailand is all this: Thousands of curves, very good road surface (asphalt), nearly no traffic, beautiful scenery,good food, nice people and cheap. What else do you need for a good holiday?
And there is safety to travel. Even a woman can drive there :)
Like me.
Regards
Jolandarc